Siemens 3TK28 - Technical Data 3 TK2856; 3 TK2857

Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
176 Manual, 07/2016, NEB926157502000/RS-AB/003
3.8.4.7
Technical data 3TK2856 / 3TK2857
3TK2856-.B...
3TK2857-.B...
EMC emitted interference
IEC 60947-5-1, IEC 60000-4-3,
IEC 60000-4-5, IEC 60000-4-6
Item designation
• according to DIN 40719 extendable after IEC 204-2
according to IEC 750
KT
• according to DIN EN 61346-2
F
Number of sensor inputs 1-channel or 2-channel
—
Design of the cascading
cascading and in-service switching
Type of the safety-related wiring of the inputs
—
Product feature
transverse contact-secure
No
Safety Integrity Level (SIL) according to IEC 61508
SIL3
SIL claim limit (for a subsystem) according to EN 62061
3
Safety integrity level (SIL)
for delayed release circuit
according to IEC 61508
— SIL3
Performance Level (PL)
• according to ISO 13849-1
e
• for delayed release circuit according to ISO 13849-1
— e
Category
• according to EN 954-1
corresponds to basic unit
• according to ISO 13849-1
4
Safety device type according to IEC 61508-2
Type B
Probability of dangerous failure per hour (PFHD)
with high
demand rate according to EN 62061
1/h 0.000000011
T1 value
for proof test interval or service life
according
to IEC 61508
a 20